diff --git a/packages/app-testing/src/calls/index.js b/packages/app-testing/src/calls/index.js
index 9357a57928..e1bd3d19d3 100644
--- a/packages/app-testing/src/calls/index.js
+++ b/packages/app-testing/src/calls/index.js
@@ -3,6 +3,8 @@
 // of the ISC license. See the LICENSE file for details.
 // @flow
 
+// TODO: Move to API
+
 import type { Calls } from './types';
 
 const bnToU8a = require('@polkadot/util/bn/toU8a');
diff --git a/packages/app-testing/src/encode/index.js b/packages/app-testing/src/encode/index.js
index f574c63851..8e1f635ad8 100644
--- a/packages/app-testing/src/encode/index.js
+++ b/packages/app-testing/src/encode/index.js
@@ -3,6 +3,8 @@
 // of the ISC license. See the LICENSE file for details.
 // @flow
 
+// TODO: Move to API
+
 import type BN from 'bn.js';
 import type { Call } from '../calls/types';